Based on the geologic occurrence,petrologic and isotopic age characteristics,authors of this article have identified 2 suites of dacite at Xiangshan uranium ore?field,and recognized that rhyolite?dacite is of volcanic effusion phase,but rhyolite?dacite porphyry belongs to hypabyssal intrusive phase.

Gacun type argentiferous polymetallic deposits are confined to rhyolitic volcanic rock belonging tocalco - alkaline volcanic suite related to submarine eruption in the late Yidun island arc invironment.

Identification of rhyolite?dacite porphyry and its relation to uranium mineralization at Xiangshan uranium ore-field;